Statistics: Informed Decisions Using Data (4th Edition)

Published by Pearson
ISBN 10: 0321757270
ISBN 13: 978-0-32175-727-2

Chapter 6 - Section 6.2 - Assess Your Understanding - Applying the Concepts - Page 345: 37e

Answer

$P(x \geq 20)$ = 0.0004 Yes, it would be unusual to find 20 or more people who believe the overall state of morals is poor. This is because ($P(x \geq 20)$ is less than 0.05.

Work Step by Step

$P(x \geq 20)$ = $1- P(x < 20)$ = $1- P(x\leq19)$ = $1 - 0.9996$ = 0.0004 Since table IV doesn't have the probabilities for when n = 25, we use technology or a statistical software to find $P(x \leq 19)$.
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